圖書典藏及影音數位平台

1.依據河川區域種植規定修正規定第3點規定，將卑南溪水系卑南溪及鹿野溪與鹿寮溪河川區域內高灘地按照河寬、平均坡降、平均流速、高灘地水深等評估參數，將河川區域之可種植區域劃分五等級，另依河川管理辦法第37條規定評估禁止種植區域範圍，便於河川管理工作之執行，及民眾申請案件之管控。2.清查河川區域內公私有地使用現況，針對原住民保留地及私有地，測量其範圍並查使用人資料。

It’s been quite long time since the start of permitting farming activities on Beinan River floodplains. However, the river characters such as steep slope and dry/wet season flow difference cause river morphologic changes on either main channel or floodplain, and such braided channels are found unstable in terms of bed elevation changes caused by sediment deposition/erosion. Taking the authority’s management requirement into consideration, reassessment for farming availability classification (5 levels) based on weighted hydraulic parameters (e.g. flow velocity, floodplain depth, slope and channel width) is necessary and has to be performed regulated by the latest regulation. Unfortunately, the river region maps are not consistent with the current floodplain conditions, and need to be updated regarding the farming classification. The final target towards floodplain management is to implement effective practices to solve conflicts and problems under the priority of drainage safety. Thus, the high-stem crop cultivation is not recommended on the floodplains. The investigation results of this study found that the number of public land blocks (414.75 hecs in area) is down to 483 compared last investigation took in 2009 mainly due to land loss and land combined. It also found the crop types are no big change. Paddy, squash-like vegetable and melon filed dominate 80% of the cultivable lands on the floodplain. Among them, the area of paddy fields are found decreasing but are still the majority. In other hand, the area of melon fields are found increasing. In spite of the lands that classified as Level V due to their locations in the vicinity of bridges, the other lands are classified on basis of the farming regulations, hydraulic analysis and more importantly, management practices. The evaluated cultivatable classes suggest Level IV and V for the floodplain lands, which are consistent with the existing crops at certain level. As a result, the high-stem crops are still not recommended. Statistically speaking, 86 public parcels (85.47 hecs) and 670 registered private parcels (201.87 hecs) are classified into Level IV, while 397 public parcels (329.28 hecs) and 598 registered private parcels (118.29 hecs) are classified into Level IV.